74 Cumacea: 9. Leuconidae, 1. Leucou, 2. Eudorella 



in the next 2 pairs. Peduncle of uropods intermediate in length between 

 the shorter endopod and longer exopod: endopod about two-thirds of exopod, 

 with 1^"^ joint nearly twice as long as 2"*^, carrying 6 or 7 spines on the 

 medial margin, the last much the largest: 2°'^ joint with 4 spines on medial 

 margin and a large terminal. Colour yellowish white. L. 9 about 5 mm. 

 Adult d not known. 



South Georgia, depths 12 — 310 m. 



20. L. vanhoeffeni Zimmer 1907 L. v., Zimmer in: Zool. Anz., u3I p. 226. 



Body rather narrow. Pseudorostral lobes short, bent very obliquely 

 upwards, only subacute; antero-lateral corners preceded by a broad sinus. 

 Median carina of carapace equipped with 5 — 7 teeth and extending about to 

 the middle. Eyelobe rudimentary. Antenna 1, 1 -jointed accessory about 

 three-fourths as long as P* joint of principal flagellum. Peraeopod 1, 6*^ 

 and 7^^ joints equal, 5**1 longer than either. Peduncle of uropods about 

 three-fourths as long as the exopod and about as long as the endopod, which 

 has about 8 spines on medial margin of 1^' joint and 6 on that of the 2"'^ 

 and a strong apical spine. L., 9 with commencing marsupium, about 5 mm. 

 Adult 6 not known. 



Kerguelen, on Macrocystis. 



L. leuckartii Marcusea 1867 L. l, Marcusen in: Arch. Naturg., u 33i p. 360 

 (descr. nulla). 



Black Sea. 



2. Gen. Eudorella A. M. Norman 



1846 Leucon (part.), Kroyer in: Naturh. Tidsskr., ser. 2 v.2n p. 208 | 1856 Etidora 

 (nou Eudom, Peron & Lesueur, 1809 Hydrozoa, nee Uaan 1833, Crust.), Bate in: Ann. 

 nat. Hist., ser. 2 ?;. 17 p. 457 | 1863 Cyrianassa (part.), A.M. Norman in: Tr. Tyneside 

 Club, i;. 5iv p. 273 | 1865 Eudora, G. O. Sars in: Forh. Selsk. Christian., 1864 p. 184 | 

 1867 Eudorella, A.M.Norman in: Rep. Brit. Ass., ». 36 p. 194, 197 (nota) I 1869 Eudora 

 G. 0. Sars in: Nyt Mag. Naturv., v.lQ p. 346 | 1871 Eudorella (part.), G. 0. Sars in: 

 Svenska Ak. Handl., n. ser. v. 9 nr. 13 p. 43 | 1877 E. (part.), Meinert in: Naturh. Tidsskr., 

 ser. 3 v.U p. 181 1 1879 E., G. 0. Sars in: Arch. Naturv. Kristian., r. 4 p. 33 ] 1879 E. 

 (part.), S.I. Smith in: Tr. Connect. Ac, v. 01 p. 115 | 1883 E., G. 0. Sars in: Forh. 

 Selsk. Christian., 1882 nr. 18 p. 12 | 1887 E., G. O. Sars in: Rep. Yoy. Challenger, v. 19 

 pars 55 p. 7, 40 | 1900 E., G. 0. Sars. Crust. Norway, v. 3 p. 35 | 1900 E., Zimmer in: 

 Fauna arctica, v.l p. 418, 433 | 1907 jB., Caiman in: Tr. zool. Soc. London, «.18i p. 31 | 

 1908 E., Zimmer in: Ergeb. Tiefsee-Exp., v. 8 p. 176, 179 | 1909 E., Stappers in: Cellule, 

 V. 25 p. 369 (alimentary system). 



Body slender. Carapace short, subtruncate. Eyelobe obsolete. Efferent 

 opening for water circulation dorsal. First antennae geniculate between 2^^ 

 and -S*^ joints. Uropods with exopod shorter than the endopod. Hepato- 

 pancreatic glands with four pairs of lobes. 



13 species. 



Synopsis of species : 

 / Sinus above antero-lateral corner of carapace simply 

 I concave — 2. 



j Sinus above antero-lateral corner of carapace not simply 

 I concave — 4. 

 I Uropods having apical spine of endopod fused with the 2n<i 



2 J joint 1. E. emarginata 



I Uropods having apical spine of endopod distinct — 3. 



